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jQuery Determine if a matched class has a given id

... combining multiple selectors. For instance, we could target all elements with a given id, that also have a particular class: $("#foo.bar"); // Matches <div id="foo" class="bar"> This should look similar to something you'd write in CSS. Note that it won't apply to all #foo elements (though ...
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The performance impact of using instanceof in Java

... Modern JVM/JIT compilers have removed the performance hit of most of the traditionally "slow" operations, including instanceof, exception handling, reflection, etc. As Donald Knuth wrote, "We should forget about small efficiencies, say a...
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renamed heroku app from website, now it's not found

After renaming my heroku app from the heroku website, whenever I cd to its directory in a terminal and run any heroku command, I get App not found . Does anybody know of a way to remedy this? ...
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How to get package name from anywhere?

I am aware of the availability of Context.getApplicationContext() and View.getContext() , through which I can actually call Context.getPackageName() to retrieve the package name of an application. ...
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How to style a div to be a responsive square? [duplicate]

I want my div to adapt its height to always equal its width. The width is percental. When the parent's width decreases, the box should decrease by keeping its aspect ratio. ...
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How to install Maven 3 on Ubuntu 18.04/17.04/16.10/16.04 LTS/15.10/15.04/14.10/14.04 LTS/13.10/13.04

...follow | edited Jun 6 '15 at 18:41 APerson 6,97644 gold badges3131 silver badges4747 bronze badges ...
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What does the @ symbol represent in objective-c?

I'm learning objective-c and keep bumping into the @ symbol. It is used in different scenarios, for example at the start of a string or to synthesise accessor methods. ...
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How to escape @ characters in Subversion managed file names?

... example, "svn info test.txt@1234" will give information about test.txt as it existed in revision 1234. 11 Answers ...
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How to view files in binary from bash?

...follow | edited Apr 10 at 8:47 Matthias Braun 22k1616 gold badges104104 silver badges138138 bronze badges ...
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Inconsistent Accessibility: Parameter type is less accessible than method

... Constructor of public class clients is public but it has a parameter of type ACTInterface that is private (it is nested in a class?). You can't do that. You need to make ACTInterface at least as accessible as clients. ...